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Foss Dam

Photo of Foss Dam and Reservoir
Related Projects & Facilities
Washita Basin Project
Fort Cobb Dam
Related Links
Schedule of Proposed NEPA Actions
Foss Reservoir at Recreation.gov
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Overview General Dimensions Hydraulics & Hydrology Contact Information
The dam site foundation consists of sandy and silty clay overburden underlain by essentially horizontally bedded sandstones, shales and gypsum of the Cloud Chief formation.  Overburden materials vary from 15 to 20 feet on the left abutment and from 0 to 6 feet on the right abutment.  In the old or buried river channel, the depth to bedrock is about 125 feet.  The upper 70 feet of overburden is composed of silty and sandy clay, while the remaining 55 feet is sand and gravel.  Beneath the gravel, bedrock consists of a 15-foot bed of silty sandstone underlain by seven feet of gypsum.

Last updated: Mar 29, 2013